Skull theory, boy or girl? Or maybe a nub?

Hello, I Am new here, can anyone tell me if you see a nub in my ultra sound Photo?
Or based on the skull, is this a boy or girl?

Photo is 11 weeks and 4 days

I can't see a nub personally but with the skull theory I would lean girl. I wouldn't really rely on the skull theory though!

Thanks, isn't the skull theory accurate?

Not really, especially when you only see one ultrasound picture. Sometimes the shape of the head does not appear accurately.

I think I may see a boy nub in white at the end of abdomen. So I would say boy.